How to use FastHeaderParse method of Microsoft.VisualStudio.TestPlatform.CommunicationUtilities.JsonDataSerializer class

Best Vstest code snippet using Microsoft.VisualStudio.TestPlatform.CommunicationUtilities.JsonDataSerializer.FastHeaderParse

JsonDataSerializer.cs

Source:JsonDataSerializer.cs

...82            return Deserialize<VersionedMessage>(rawMessage)!;83        }84        // PERF: Try grabbing the version and message type from the string directly, we are pretty certain how the message is serialized85        // when the format does not match all we do is that we check if 6th character in the message is 'V'86        if (!FastHeaderParse(rawMessage, out int version, out string? messageType))87        {88            // PERF: If the fast path fails, deserialize into header object that does not have any Payload. When the message type info89            // is at the start of the message, this is also pretty fast. Again, this won't touch the payload.90            MessageHeader header = JsonConvert.DeserializeObject<MessageHeader>(rawMessage, JsonSettings)!;91            version = header.Version;92            messageType = header.MessageType;93        }94        var message = new VersionedMessageWithRawMessage95        {96            Version = version,97            MessageType = messageType,98            RawMessage = rawMessage,99        };100        return message;101    }102    /// <summary>103    /// Deserialize the <see cref="Message.Payload"/> for a message.104    /// </summary>105    /// <param name="message">A <see cref="Message"/> object.</param>106    /// <typeparam name="T">Payload type.</typeparam>107    /// <returns>The deserialized payload.</returns>108    public T? DeserializePayload<T>(Message? message)109    {110        if (message is null)111        {112            return default;113        }114        if (message.GetType() == typeof(Message))115        {116            // Message is specifically a Message, and not any of it's child types like VersionedMessage.117            // Get the default serializer and deserialize. This would be used for any message from very old test host.118            //119            // Unit tests also provide a Message in places where using the deserializer would actually120            // produce a VersionedMessage or VersionedMessageWithRawMessage.121            var serializerV1 = GetPayloadSerializer(null);122            TPDebug.Assert(message.Payload is not null, "Payload should not be null");123            return Deserialize<T>(serializerV1, message.Payload);124        }125        var versionedMessage = (VersionedMessage)message;126        var payloadSerializer = GetPayloadSerializer(versionedMessage.Version);127        if (DisableFastJson)128        {129            // When fast json is disabled, then the message is a VersionedMessage130            // with JToken payload.131            TPDebug.Assert(message.Payload is not null, "Payload should not be null");132            return Deserialize<T>(payloadSerializer, message.Payload);133        }134        // When fast json is enabled then the message is also a subtype of VersionedMessage, but135        // the Payload is not populated, and instead the rawMessage string it passed as is.136        var messageWithRawMessage = (VersionedMessageWithRawMessage)message;137        var rawMessage = messageWithRawMessage.RawMessage;138        if (rawMessage == null)139        {140            return default;141        }142        // The deserialized message can still have a version (0 or 1), that should use the old deserializer143        if (payloadSerializer == PayloadSerializerV2)144        {145            // PERF: Fast path is compatibile only with protocol versions that use serializer_2,146            // and this is faster than deserializing via deserializer_2.147            var messageWithPayload = JsonConvert.DeserializeObject<PayloadedMessage<T>>(rawMessage, FastJsonSettings);148            return messageWithPayload == null ? default : messageWithPayload.Payload;149        }150        else151        {152            // PERF: When payloadSerializer1 was resolved we need to deserialize JToken, and then deserialize that.153            // This is still better than deserializing the JToken in DeserializeMessage because here we know that the payload154            // will actually be used.155            TPDebug.Assert(rawMessage is not null, "rawMessage should not be null");156            var rawMessagePayload = Deserialize<Message>(rawMessage)?.Payload;157            TPDebug.Assert(rawMessagePayload is not null, "rawMessagePayload should not be null");158            return Deserialize<T>(payloadSerializer, rawMessagePayload);159        }160    }161    private static bool FastHeaderParse(string rawMessage, out int version, out string? messageType)162    {163        // PERF: This can be also done slightly better using ReadOnlySpan<char> but we don't have that available by default in .NET Framework164        // and the speed improvement does not warrant additional dependency. This is already taking just few ms for 10k messages.165        version = 0;166        messageType = null;167        try168        {169            // The incoming messages look like this, or like this:170            // {"Version":6,"MessageType":"TestExecution.GetTestRunnerProcessStartInfoForRunAll","Payload":{171            // {"MessageType":"TestExecution.GetTestRunnerProcessStartInfoForRunAll","Payload":{172            if (rawMessage.Length < 31)173            {174                // {"MessageType":"T","Payload":1} with length 31 is the smallest valid message we should be able to parse..175                return false;...

FastHeaderParse

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using Microsoft.VisualStudio.TestPlatform.CommunicationUtilities;7{8    {9        static void Main(string[] args)10        {11            string json = "{\"MessageType\":\"TestRunStatsChange\",\"Payload\":{\"NewStats\":{\"ExecutedTests\":1,\"PassedTests\":1,\"FailedTests\":0,\"SkippedTests\":0,\"PendingTests\":0,\"TotalTests\":1}}}";12            var result = JsonDataSerializer.FastHeaderParse(json);13            Console.WriteLine("MessageType: {0}", result.Item1);14            Console.WriteLine("Payload: {0}", result.Item2);15            Console.ReadLine();16        }17    }18}19Payload: {"NewStats":{"ExecutedTests":1,"PassedTests":1,"FailedTests":0,"SkippedTests":0,"PendingTests":0,"TotalTests":1}}

FastHeaderParse

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using Microsoft.VisualStudio.TestPlatform.CommunicationUtilities;7{8    {9        static void Main(string[] args)10        {11            byte[] bytes = new byte[100];12            JsonDataSerializer serializer = new JsonDataSerializer();13            serializer.FastHeaderParse(bytes);14        }15    }16}

FastHeaderParse

Using AI Code Generation

1using Microsoft.VisualStudio.TestPlatform.CommunicationUtilities;2using Microsoft.VisualStudio.TestPlatform.ObjectModel;3using Microsoft.VisualStudio.TestPlatform.ObjectModel.Client;4using Microsoft.VisualStudio.TestPlatform.ObjectModel.Logging;5using System;6using System.Collections.Generic;7using System.Linq;8using System.Text;9using System.Threading.Tasks;10{11    {12        public void Initialize(TestLoggerEvents events, string testRunDirectory)13        {14            events.TestRunMessage += Events_TestRunMessage;15        }16        private void Events_TestRunMessage(object sender, TestRunMessageEventArgs e)17        {18            if (e.Level == TestMessageLevel.Informational)19            {20                var json = JsonDataSerializer.Instance.FastHeaderParse(e.Message);21                if (json != null)22                {23                    Console.WriteLine("Message: {0}", json["Message"]);24                }25            }26        }27    }28}29using Microsoft.VisualStudio.TestPlatform.CommunicationUtilities;30using Microsoft.VisualStudio.TestPlatform.ObjectModel;31using Microsoft.VisualStudio.TestPlatform.ObjectModel.Client;32using Microsoft.VisualStudio.TestPlatform.ObjectModel.Logging;33using System;34using System.Collections.Generic;35using System.Linq;36using System.Text;37using System.Threading.Tasks;38{39    {40        public void Initialize(TestLoggerEvents events, string testRunDirectory)41        {42            events.TestRunMessage += Events_TestRunMessage;43        }44        private void Events_TestRunMessage(object sender, TestRunMessageEventArgs e)45        {46            if (e.Level == TestMessageLevel.Informational)47            {48                var json = JsonDataSerializer.Instance.FastHeaderParse(e.Message);49                if (json != null)50                {51                    Console.WriteLine("Message: {0}", json["Message"]);52                }53            }54        }55    }56}57using Microsoft.VisualStudio.TestPlatform.CommunicationUtilities;58using Microsoft.VisualStudio.TestPlatform.ObjectModel;59using Microsoft.VisualStudio.TestPlatform.ObjectModel.Client;60using Microsoft.VisualStudio.TestPlatform.ObjectModel.Logging;61using System;62using System.Collections.Generic;63using System.Linq;64using System.Text;65using System.Threading.Tasks;66{67    {68        public void Initialize(TestLoggerEvents events, string testRunDirectory)

FastHeaderParse

Using AI Code Generation

1using Microsoft.VisualStudio.TestPlatform.CommunicationUtilities;2using Microsoft.VisualStudio.TestPlatform.ObjectModel;3using System;4using System.Collections.Generic;5using System.Linq;6using System.Text;7using System.Threading.Tasks;8{9    {10        static void Main(string[] args)11        {12            string json = @"{13                ""Payload"": {14                }15            }";16            var data = JsonDataSerializer.Instance.FastHeaderParse(json);17            Console.WriteLine(data.Version);18            Console.WriteLine(data.MessageType);19            Console.WriteLine(data.Payload);20            Console.ReadLine();21        }22    }23}24{25}

FastHeaderParse

Using AI Code Generation

1using Microsoft.VisualStudio.TestPlatform.CommunicationUtilities;2using Microsoft.VisualStudio.TestPlatform.ObjectModel;3using Microsoft.VisualStudio.TestPlatform.ObjectModel.Client;4using System;5using System.IO;6using System.Text;7{8    {9        static void Main(string[] args)10        {11            string json = @"{""MessageType"":""TestRunMessage"",""Payload"":{""MessageLevel"":""Informational"",""Message"":""Starting test execution, please wait..."",""Version"":""

FastHeaderParse

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using Microsoft.VisualStudio.TestPlatform.CommunicationUtilities;7using Microsoft.VisualStudio.TestPlatform.ObjectModel;8using Microsoft.VisualStudio.TestPlatform.ObjectModel.Client;9using Microsoft.VisualStudio.TestPlatform.ObjectModel.Logging;10{11    {12        static void Main(string[] args)13        {14            var serializer = new JsonDataSerializer();15            var data = new Dictionary<string, object>();16            data.Add("TestRunCompletePayload", new TestRunCompletePayload());17            data.Add("TestRunStatistics", new TestRunStatistics());18            data.Add("TestRunChangedEventArgs", new TestRunChangedEventArgs());19            data.Add("TestRunMessagePayload", new TestRunMessagePayload());20            data.Add("DiscoveryCompleteEventArgs", new DiscoveryCompleteEventArgs());21            data.Add("TestRunCompleteEventArgs", new TestRunCompleteEventArgs());22            data.Add("TestRunChangedEventArgs", new TestRunChangedEventArgs());23            data.Add("TestRunMessageEventArgs", new TestRunMessageEventArgs());24            data.Add("TestRunStartEventArgs", new TestRunStartEventArgs());25            data.Add("TestSessionMessageEventArgs", new TestSessionMessageEventArgs());26            data.Add("DiscoveryCompletePayload", new DiscoveryCompletePayload());27            data.Add("DiscoveryMessagePayload", new DiscoveryMessagePayload());28            data.Add("DiscoveryRequestPayload", new DiscoveryRequestPayload());29            data.Add("DiscoveryResultPayload", new DiscoveryResultPayload());30            data.Add("TestRunCompletePayload", new TestRunCompletePayload());31            data.Add("TestRunMessagePayload", new TestRunMessagePayload());32            data.Add("TestRunRequestPayload", new TestRunRequestPayload());33            data.Add("TestRunStartPayload", new TestRunStartPayload());34            data.Add("TestRunStatisticsPayload", new TestRunStatisticsPayload());35            data.Add("TestSessionMessagePayload", new TestSessionMessagePayload());36            data.Add("TestSessionStartPayload", new TestSessionStartPayload());37            data.Add("TestSessionMessageEventArgs", new TestSessionMessageEventArgs());38            data.Add("TestSessionStartEventArgs", new TestSessionStartEventArgs());39            data.Add("TestRunStartEventArgs", new TestRunStartEventArgs());40            data.Add("TestRunCompleteEventArgs", new TestRunCompleteEventArgs());41            data.Add("TestRunChangedEventArgs", new TestRunChangedEventArgs());42            data.Add("TestRunMessageEventArgs", new TestRunMessageEventArgs());43            data.Add("DiscoveryCompleteEventArgs", new Discovery

FastHeaderParse

Using AI Code Generation

1var jsonSerializer = new JsonDataSerializer();2var header = jsonSerializer.FastHeaderParse(message);3var jsonSerializer = new JsonDataSerializer();4var payload = jsonSerializer.FastPayloadParse<T>(message);5var jsonSerializer = new JsonDataSerializer();6var payload = jsonSerializer.FastPayloadParse(message);7var jsonSerializer = new JsonDataSerializer();8var payload = jsonSerializer.FastPayloadParse<T>(message);9var jsonSerializer = new JsonDataSerializer();10var payload = jsonSerializer.FastPayloadParse(message);11var jsonSerializer = new JsonDataSerializer();12var payload = jsonSerializer.FastPayloadParse<T>(message);13var jsonSerializer = new JsonDataSerializer();14var payload = jsonSerializer.FastPayloadParse(message);15var jsonSerializer = new JsonDataSerializer();

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